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Elementy rur z ferrytycznej stali nierdzewnej odporne na korozję kwasową i utlenianie
Elementy rur z ferrytycznej stali nierdzewnej odporne na korozję kwasową i utlenianie
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Aplikacje:
The chromium content of ferritic stainless steel (400 series) is 15%~30%, this kind of steel generally does not contain nickel, and sometimes contains a small amount of Mo, Ti, Nb and others elements, which has the characteristics of large thermal conductivity, small expansion coefficient, good oxidation resistance and excellent anti-stress corrosion, etc, used in the manufacture of air, water vapor and water resistant and oxidizing acid corrosion of components. Ferritic stainless steel not only has low price and stable performance, but also has many unique features and advantages. It has been proved that ferritic stainless steel is an excellent substitute material in many applications that had previously been considered to be only of austenitic stainless steel (300 series). Ferritic stainless steel no contains nickel, the main element is chromium (＞10%) and iron, chromium is the element with special corrosion resistance of stainless steel, its price is relatively stable.
Chromium ferritic stainless steel according to the chromium content can be divided into three types：low, medium and high, according to the purity of steel, especially the carbon, nitrogen impurity content and can be divided into common ferritic stainless steel and ultra pure ferritic stainless steel. Common ferritic stainless steel with low temperature and room temperature brittleness, notch sensitivity and high tendency of intercrystalline corrosion, poor weldability were weakness, although this kind of steel development earlier, but has been very limited in industrial application. These defects of ordinary ferritic stainless steel are related to the purity of steel, especially the high content of carbon and nitrogen in steel.
Ferrytyczny rury ze stali nierdzewnej obejmuje niską, średnią i wysoką zawartość chromu. Niskochromowa ferrytyczna stal nierdzewna, zawierająca chrom około 11% ~ 14%, jak chińska 00Cr12 i 0Cr13Al, jak amerykańska AISI400, 405 i 406MF-2. Ten rodzaj stali ma dobrą wytrzymałość, plastyczność, odkształcenie na zimno i spawalność. Ponieważ stal zawiera pewną ilość chromu i aluminium, ma dobrą odporność na utlenianie i nie rdzewieje. 405 używany jako wieża do rafinacji ropy naftowej, okładzina szczelinowa, łopatka turbiny parowej, urządzenie do korozji siarki w wysokiej temperaturze itp. 400 do artykułów gospodarstwa domowego i biurowych itp. 409 stosowany w układach wydechowych samochodów, urządzeniach układu tłumienia, rurach zimnej i ciepłej wody itp.
Medium chromium ferritic stainless steel with a chromium content of 14% ~ 19%, such as chinese 1Cr17 and 1Cr17Mo, as american AISI429, 430, 433, 434, 435, 436, 439. This kind of steel has good corrosion resistance. Its working hardening coefficient is small (n≈2), with good deep drawing performance, but poor ductility. 430 is used for building decoration, car decoration, kitchen equipment, gas burner, and nitric acid industrial equipment, etc. 434 is used for exterior decoration of cars and buildings. 439 is used as a hose for gas water heater, coal and gas pipeline.
High chromium ferritic stainless steel has a chromium content of 19% ~ 30%, such as Cr18Si2 and Cr25 in China, AISI442, 443 and 446 in the United States. This kind of steel has good oxidation resistance. 442 is used in atmospheric intermittent, the limit temperature is 1035 ℃, the highest temperature of continuous use is 980 ℃. And 446 has better antioxidant properties.
Dane techniczne:
STANDARD GB/T | NORMA ASTM | STANDARD JIS | EN STANDARDOWE | OD | GRUBOŚĆ |
KLASA STALI | KLASA STALI | KLASA STALI | KLASA STALI | ||
06Cr19Ni10 | TP304 | SUS304 | X5CrNi18-10 1.4301 | 273-914mm | 6-70mm |
022Cr19Ni10 | TP304L | SUS304L | X2CrNi19-11 1.4306 | 273-914mm | 6-70mm |
07Cr19Ni10 | TP304H | SUS304H | X6CrNi18-10 1.4948 | 273-914mm | 6-70mm |
10Cr18Ni9NbCu38N | - | - | - | 273-914mm | 6-70mm |
06Cr25Ni20 | TP310S | SUS310S | X6CrNi25-20 1.4951 | 273-914mm | 6-70mm |
07Cr25Ni21NbN | TP310HCbN | - | - | 273-914mm | 6-70mm |
06Cr17Ni12Mo2 | TP316 | SUS316 | X5CrNiMo17-12-2 1.4401 | 273-914mm | 6-70mm |
022Cr17Ni12Mo2 | TP316L | SUS316L | X2CrNiMo17-12-2 1.4404 | 273-914mm | 6-70mm |
07Cr17Ni12Mo2 | TP316H | - | X3CrNiMo17-13-3 1.4436 | 273-914mm | 6-70mm |
06Cr17Ni12Mo2Ti | TP316Ti | SUS316Ti | X6CrNiMo17-12-2 1.4571 | 273-914mm | 6-70mm |
06Cr18Ni11Ti | TP321 | SUS321 | X6CrNiTi18-10 1.4541 | 273-914mm | 6-70mm |
07Cr19Ni11Ti | TP321H | SUS321H | - | 273-914mm | 6-70mm |
06Cr18Ni11Nb | TP347 | SUS347 | X6CrNiNb18-10 1.4550 | 273-914mm | 6-70mm |
07Cr18Ni11Nb | TP347H | SUS347H | X7CrNiNb18-10 1.4912 | 273-914mm | 6-70mm |
08Cr18Ni11NbFG | TP347HFG | - | - | 273-914mm | 6-70mm |
Note:Other size can also be provided after consuliting with customers | |||||
● Polishing is nice. ___Catherine （Thailand)
● The quality of tubes for construction is not too bad. ___Donna (Columbia)
● Professional sales man, next cooperation for you. ___Kevin (Singapore)
● After-services is good and tell us how to maintain the pipes. ___Eleanor (Malaysia)